Inventor · disambiguated record
Terumi Chikama
Also filed as: CHIKAMA TERUMI
49 granted patents·3 pending applications·1,649 citations·filing 1989–2012
99Inventor score
Top patents by PatentIndex Score
52 records- 0197US6055092AMulti-wavelength light amplifierFUJITSU LTD·Filed 1996·Granted Apr 25, 2000·167 cites·30 claims
- 0295US6480329B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2000·Granted Nov 12, 2002·38 cites·20 claims
- 0395US5737118AOptical amplifying apparatusFUJITSU LTD·Filed 1996·Granted Apr 7, 1998·117 cites·12 claims
- 0492US6400499B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2001·Granted Jun 4, 2002·24 cites·21 claims
- 0592US6351323B1Optical transmission apparatus, optical transmission system, and optical terminal stationFUJITSU LTD·Filed 1998·Granted Feb 26, 2002·87 cites·28 claims
- 0691US6373623B1Optical amplifier for use in optical communications equipmentFUJITSU LTD·Filed 2000·Granted Apr 16, 2002·39 cites·10 claims
- 0791US6292289B1Method, device, and system for transmitting a supervisory optical signalFUJITSU LTD·Filed 2000·Granted Sep 18, 2001·53 cites·35 claims
- 0890US6583900B2Optical transmission apparatus, optical transmission system, and optical terminal stationFUJITSU LTD·Filed 2001·Granted Jun 24, 2003·27 cites·26 claims
- 0988US7224517B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2002·Granted May 29, 2007·16 cites·43 claims
- 1088US6661974B1Optical transmitter and optical transmission systemFUJITSU LTD·Filed 1999·Granted Dec 9, 2003·102 cites·26 claims
- 1187US6278536B1Optical transmission device for bi-directional optical communicationFUJITSU LTD·Filed 1998·Granted Aug 21, 2001·74 cites·59 claims
- 1286US6369938B1Multi-wavelength light amplifierFUJITSU LTD·Filed 1999·Granted Apr 9, 2002·38 cites·51 claims
- 1386US6335823B2Optical amplifier for use in optical communications equipmentFUJITSU LTD·Filed 2001·Granted Jan 1, 2002·25 cites·6 claims
- 1485US7474459B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2002·Granted Jan 6, 2009·12 cites·4 claims
- 1584US6738181B1Optical sending apparatus and channel extension methodFUJITSU LTD·Filed 2000·Granted May 18, 2004·28 cites·47 claims
- 1682US4965858APolarization diversity optical receiver for coherent optical communicationFUJITSU LTD·Filed 1989·Granted Oct 23, 1990·57 cites·39 claims
- 1781US8699126B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2012·Granted Apr 15, 2014·2 cites·15 claims
- 1880US7088922B2Wavelength division multiplexing optical communication systemFUJITSU LTD·Filed 2003·Granted Aug 8, 2006·15 cites·14 claims
- 1979US5052051AHeterodyne receiver for coherent optical communicationFUJITSU LTD·Filed 1989·Granted Sep 24, 1991·49 cites·33 claims
- 2078US5115332AReceiver for coherent optical communicationFUJITSU LTD·Filed 1990·Granted May 19, 1992·67 cites·35 claims
- 2177US6647211B2Remote control device of acousto-optic tunable filter and optical transmission system containing equalizer using acousto-optic tunable filter and optical transmission system containing optical add/drop multiplexer using acousto-optic tunable filterFUJITSU LTD·Filed 2002·Granted Nov 11, 2003·15 cites·14 claims
- 2277US6344914B1Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifierFUJITSU LTD·Filed 1997·Granted Feb 5, 2002·38 cites·56 claims
- 2377US6285479B1Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unitFUJITSU LTD·Filed 1998·Granted Sep 4, 2001·66 cites·5 claims
- 2476US8320040B2Multi-wavelength light amplifierSUGAYA YASUSHI·Filed 2011·Granted Nov 27, 2012·2 cites·18 claims
- 2575US6631026B2Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control methodFUJITSU LTD·Filed 2002·Granted Oct 7, 2003·9 cites·27 claims
- 2672US6538782B1Light branching/inserting apparatus and light branching apparatus using wavelength selection filterFUJITSU LTD·Filed 1998·Granted Mar 25, 2003·33 cites·44 claims
- 2772US5903385ARemotely pumping type multi-wavelength light transmission systemFUJITSU LTD·Filed 1997·Granted May 11, 1999·32 cites·8 claims
- 2870US5003626ADual balanced optical signal receiverFUJITSU LTD·Filed 1989·Granted Mar 26, 1991·39 cites·22 claims
- 2969US8004752B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2009·Granted Aug 23, 2011·1 cites·24 claims
- 3069US5875054ABidirectional optical amplifier circuitFUJITSU LTD·Filed 1996·Granted Feb 23, 1999·41 cites·12 claims
- 3167US6366376B1Optical transmitting device using wavelength division multiplexing to transmit signal lights having frequencies arranged to eliminate effects of four-wave mixing (FWM)FUJITSU LTD·Filed 1998·Granted Apr 2, 2002·29 cites·122 claims
- 3266US5701195ALight signal reception apparatus having an improved light surge eliminating functionFUJITSU LTD·Filed 1996·Granted Dec 23, 1997·35 cites·10 claims
- 3365US6807376B2Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifierFUJITSU LTD·Filed 2001·Granted Oct 19, 2004·7 cites·7 claims
- 3464US6507431B1Remotely pumping type multi-wavelength light transmission systemFUJITSU LTD·Filed 1999·Granted Jan 14, 2003·22 cites·13 claims
- 3564US5729372AOptical transmission method and apparatus and optical amplification method and apparatus for optical communication systemFUJITSU LTD·Filed 1996·Granted Mar 17, 1998·27 cites·22 claims
- 3662US7142785B2Light branching/inserting apparatus and light branching apparatus using wavelength selection filterFUJITSU LTD·Filed 2003·Granted Nov 28, 2006·4 cites·16 claims
- 3762US6366379B1Remote control device of acousto-optic tunable filter and optical transmission system containing equalizer using acousto-optic tunable filter and optical transmission system containing optical add/drop multiplexer using acousto-optic tunable filterFUJITSU LTD·Filed 1998·Granted Apr 2, 2002·25 cites·15 claims
- 3861US6545784B2Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unitFUJITSU LTD·Filed 2001·Granted Apr 8, 2003·4 cites·7 claims
- 3961US6542291B1Optical amplifier excitation light source control method for use in optical amplifier and optical amplifier control methodFUJITSU LTD·Filed 1999·Granted Apr 1, 2003·17 cites·67 claims
- 4060US5253097ADemodulator and a polarization diversity receiver for coherent optical communication provided with the demodulatorFUJITSU LTD·Filed 1991·Granted Oct 12, 1993·31 cites·20 claims
- 4159US5050176ADirect modulation phase-shift-keying system and methodFUJITSU LTD·Filed 1990·Granted Sep 17, 1991·35 cites·15 claims
- 4257US6873457B2Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control methodFUJITSU LTD·Filed 2003·Granted Mar 29, 2005·2 cites·67 claims
- 4357US6496300B2Optical amplifierFUJITSU LTD·Filed 1998·Granted Dec 17, 2002·20 cites·6 claims
- 4456US5539566AOptical transmission method and apparatus and optical amplification method and apparatus for optical communication systemFUJITSU LTD·Filed 1995·Granted Jul 23, 1996·20 cites·55 claims
- 4555US5228043ADirect modulation phase shift keying (dm-psk) transmission systemFUJITSU LTD·Filed 1991·Granted Jul 13, 1993·24 cites·17 claims
- 4654US6411411B1Optical wavelength selective control apparatusFUJITSU LTD·Filed 1998·Granted Jun 25, 2002·18 cites·58 claims
- 4753US2007165299A1Multi-wavelength light amplifierFUJITSU LTD·Filed 2007·Application pending·0 cites
- 4848US6891662B2Optical amplifier and method for amplifying wavelength multiplexed transmission signal lightFUJITSU LTD·Filed 2001·Granted May 10, 2005·2 cites·28 claims
- 4942US2001046084A1Multi-wavelength light amplifierFiled 2001·Application pending·0 cites
- 5040US6178037B1Optical amplifying apparatusFUJITSU LTD·Filed 1998·Granted Jan 23, 2001·7 cites·8 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →